Flight number record
AS 253
Alaska Airlines · Kailua-Kona to Portland
- Route
- KOA → PDX
- Departs
- 11:58
- Flights
- 294
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 253, check with Alaska Airlines.
AS 253 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 55 minutes. That rests on 294 flights, with a median arrival 10 minutes early.
Set against the rest of the country, AS 253's record is 8 points better than the US average of 77.3%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.
Key figures
On time
85.0%
Arrivals under 15 minutes late, of 293 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.34%
National rate is 1.89%
1 hour+ late
3.8%
National rate is 8.3%
These figures cover 294 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When AS 253 flies
AS 253 flies KOA to PDX without a single fixed slot. Its most common scheduled departure was 11:58, used on 70 of 294 flights, with 13:19 (34 flights) next.
- Departs 11:5870 flights23.8%
- Departs 13:1934 flights11.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 11:58 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and AS 253 runs 7 points better at 85.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
AS 253 next to KOA to PDX
Every carrier on KOA to PDX combined arrived on time 83.2% of the time across 365 flights, so AS 253 is 2 points ahead of it. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 253thin sample | 294 | 85.0% | 54 min | 0.34% | A+ |
| All Alaska Airlines on KOA–PDX | 365 | 83.2% | 48 min | 0.27% | B+ |
| All carriers on KOA–PDX | 365 | 83.2% | 48 min | 0.27% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 253 quarter by quarter
AS 253 did not run the same all year. Its best quarter was Jul–Sep 2026 at 93.8% on time and its weakest Oct–Dec 2025 at 79.1%, a swing of 15 points on roughly 74 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Oct–Dec 202567 flights79.1%
- Jan–Mar 202687 flights80.5%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202649 flights93.8%
Scale runs 70% to 100%.
By weekday, AS 253 did best on Tuesday at 90.7% on time and worst on Monday at 76.7%. Each day rests on about 42 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 253 runs when it is late
AS 253 often beats the schedule: 123 of 293 completed flights, 42%, arrived 15 minutes or more early. The 44 late arrivals split 19 under half an hour, 14 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early123 flights42.0%
- Within 15 min126 flights43.0%
- 15–29 min late19 flights6.5%
- 30–59 min late14 flights4.8%
- 1–2 hours late7 flights2.4%
- 2+ hours late4 flights1.4%
Scale runs 0% to 100%.
Share of 293 completed flights by arrival against schedule.
A late pushback is often recovered here: of 67 departures that left 15 minutes late or more, 34 still arrived on time. 11 flights left on time and still arrived late.
The worst days
Worst days for AS 253
The latest arrival of the period was on 30 October 2025, 8 hours 24 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 October 2025 | 8 hours 24 minutes | Late-arriving aircraft |
| 17 May 2026 | 2 hours 53 minutes | Late-arriving aircraft |
| 6 February 2026 | 2 hours 28 minutes | Carrier |
| 12 January 2026 | 2 hours 3 minutes | Carrier |
| 24 January 2026 | 1 hour 30 minutes | Late-arriving aircraft |
Delay causes
Why AS 253 runs late
Late-arriving aircraft accounts for 56% of the 2,385 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Late-arriving aircraft
- 25%Carrier
- 14%National Airspace System
- 5%Extreme weather
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,385 reported delay minutes here, that single category outweighs weather by 11 to one. The split is drawn from 2,385 delay minutes reported on AS 253.
Cancellations are rare at 0.34%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.8% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 2,607 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on one other city pair in the data, including SEA to ANC (10), but none flew often enough under AS 253 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to KOA to PDX only.
One caution: this is a thin sample. 294 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AS 253
For a booking, AS 253 has one of the better records a US domestic flight can show: 85.0% on time and 0.34% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- Portland International (PDX) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.